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		<title>three.js webgl - materials - compressed textures</title>
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			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl - PVR compressed textures
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';

			import { PVRLoader } from 'three/addons/loaders/PVRLoader.js';

			let camera, scene, renderer;
			const meshes = [];

			init();

			function init() {

				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 2000 );
				camera.position.z = 1000;

				scene = new THREE.Scene();

				const geometry = new THREE.BoxGeometry( 200, 200, 200 );

				//

				const onCube1Loaded = function ( texture ) {

					texture.magFilter = THREE.LinearFilter;
					texture.minFilter = THREE.LinearFilter;
					texture.mapping = THREE.CubeReflectionMapping;
					texture.colorSpace = THREE.SRGBColorSpace;
					material6.needsUpdate = true;

				};

				const onCube2Loaded = function ( texture ) {

					texture.magFilter = THREE.LinearFilter;
					// texture.minFilter = LinearMipmapNearestFilter;
					texture.minFilter = THREE.LinearFilter;
					texture.mapping = THREE.CubeReflectionMapping;
					texture.colorSpace = THREE.SRGBColorSpace;
					material8.needsUpdate = true;

				};

				//

				const loader = new PVRLoader();

				const disturb_4bpp_rgb = loader.load( 'textures/compressed/disturb_4bpp_rgb.pvr' );
				const disturb_4bpp_rgb_v3 = loader.load( 'textures/compressed/disturb_4bpp_rgb_v3.pvr' );
				const disturb_4bpp_rgb_mips = loader.load( 'textures/compressed/disturb_4bpp_rgb_mips.pvr' );
				const disturb_2bpp_rgb = loader.load( 'textures/compressed/disturb_2bpp_rgb.pvr' );
				const flare_4bpp_rgba = loader.load( 'textures/compressed/flare_4bpp_rgba.pvr' );
				const flare_2bpp_rgba = loader.load( 'textures/compressed/flare_2bpp_rgba.pvr' );
				const park3_cube_nomip_4bpp_rgb = loader.load( 'textures/compressed/park3_cube_nomip_4bpp_rgb.pvr', onCube1Loaded );
				const park3_cube_mip_2bpp_rgb_v3 = loader.load( 'textures/compressed/park3_cube_mip_2bpp_rgb_v3.pvr', onCube2Loaded );

				disturb_2bpp_rgb.minFilter =
				disturb_2bpp_rgb.magFilter =
				flare_4bpp_rgba.minFilter =
				flare_4bpp_rgba.magFilter =
				disturb_4bpp_rgb.minFilter =
				disturb_4bpp_rgb.magFilter =
				disturb_4bpp_rgb_v3.minFilter =
				disturb_4bpp_rgb_v3.magFilter =
				flare_2bpp_rgba.minFilter =
				flare_2bpp_rgba.magFilter = THREE.LinearFilter;

				disturb_2bpp_rgb.encoding =
				flare_4bpp_rgba.encoding =
				disturb_4bpp_rgb.encoding =
				disturb_4bpp_rgb_v3.encoding =
				flare_2bpp_rgba.colorSpace = THREE.SRGBColorSpace;

				const material1 = new THREE.MeshBasicMaterial( { map: disturb_4bpp_rgb } );
				const material2 = new THREE.MeshBasicMaterial( { map: disturb_4bpp_rgb_mips } );
				const material3 = new THREE.MeshBasicMaterial( { map: disturb_2bpp_rgb } );
				const material4 = new THREE.MeshBasicMaterial( { map: flare_4bpp_rgba, side: THREE.DoubleSide, depthTest: false, transparent: true } );
				const material5 = new THREE.MeshBasicMaterial( { map: flare_2bpp_rgba, side: THREE.DoubleSide, depthTest: false, transparent: true } );
				const material6 = new THREE.MeshBasicMaterial( { envMap: park3_cube_nomip_4bpp_rgb } );
				const material8 = new THREE.MeshBasicMaterial( { envMap: park3_cube_mip_2bpp_rgb_v3 } );

				const material7 = new THREE.MeshBasicMaterial( { map: disturb_4bpp_rgb_v3 } );

				//

				let mesh = new THREE.Mesh( geometry, material1 );
				mesh.position.x = - 500;
				mesh.position.y = 200;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material2 );
				mesh.position.x = - 166;
				mesh.position.y = 200;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material3 );
				mesh.position.x = 166;
				mesh.position.y = 200;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material7 );
				mesh.position.x = 500;
				mesh.position.y = 200;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material4 );
				mesh.position.x = - 500;
				mesh.position.y = - 200;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( geometry, material5 );
				mesh.position.x = - 166;
				mesh.position.y = - 200;
				scene.add( mesh );
				meshes.push( mesh );

				const torus = new THREE.TorusGeometry( 100, 50, 32, 24 );

				mesh = new THREE.Mesh( torus, material6 );
				mesh.position.x = 166;
				mesh.position.y = - 200;
				scene.add( mesh );
				meshes.push( mesh );

				mesh = new THREE.Mesh( torus, material8 );
				mesh.position.x = 500;
				mesh.position.y = - 200;
				scene.add( mesh );
				meshes.push( mesh );

				//

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				document.body.appendChild( renderer.domElement );

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function animate() {

				const time = Date.now() * 0.001;

				for ( let i = 0; i < meshes.length; i ++ ) {

					const mesh = meshes[ i ];
					mesh.rotation.x = time;
					mesh.rotation.y = time;

				}

				renderer.render( scene, camera );

			}

		</script>

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